Pretty interesting. "Ice Cream Sandwich (Android 4.0) is our biggest redesign yet - both for users and developers. We've enhanced the UI framework with new interactions and styles that will let you create Android apps that are simpler and more beautiful than ever before. To help you in that mission, we're introducing Android Design: the place to learn about principles, building blocks, and patterns for creating world-class Android user interfaces. Whether you're a UI professional or a developer playing that role, these docs show you how to make good design decisions, big and small."